Adaptor Transfer Case for Modular Unimog Powertrain Reconfiguration

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The existing methods for reconfiguring the powertrain of Unimog vehicles are costly and time-consuming, as they often require replacing the entire transmission system, including the transfer case, which is difficult to remove and replace due to its central location and robust construction.

Innovation Solution

The introduction of an adaptor transfer case that can be retrofitted to Unimog vehicles, allowing for the reconfiguration of the powertrain without replacing the original transfer case. This adaptor transfer case is configured to receive power from the powertrain and output it to the primary transfer case, enabling the replacement of the gearbox while maintaining the original transfer case in its central location.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the entire transmission system including the transfer case is replaced to reconfigure the powertrain, then the powertrain can be modernized, but the cost and time required for replacement increase significantly

Engineering Contradiction:

Improvepowertrain reconfiguration capabilityVSAvoidreplacement time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The transmission system is segmented into separate functional components: the original transfer case remains in place while only the gearbox is replaced. The adaptor transfer case acts as an intermediate component that couples the new gearbox to the existing transfer case, allowing modular replacement without replacing the entire transmission system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The adaptor transfer case serves as an intermediary component between the new gearbox and the original transfer case. It provides the necessary coupling interface, allowing the new gearbox to connect to the existing transfer case without direct integration, thus enabling powertrain reconfiguration while preserving the original transfer case.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If the entire transmission system including the transfer case is replaced to reconfigure the powertrain, then the powertrain can be modernized, but the replacement cost increases

Engineering Contradiction:

Improvepowertrain reconfiguration capabilityVSAvoidreplacement cost

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The original transfer case is recovered and retained in the system rather than being discarded. By using the adaptor transfer case as an intermediary, the existing transfer case continues to serve its function, eliminating the need to purchase and install a new transfer case, thus reducing replacement costs.

Inventive Principle:

Principle #34Discarding and recovering

3Adaptability or versatility

If the transfer case is replaced, then the powertrain can be reconfigured, but the optimal driveline geometry and efficiency are compromised

Engineering Contradiction:

Improvepowertrain reconfiguration capabilityVSAvoiddriveline efficiency

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

Instead of replacing the transfer case to achieve powertrain reconfiguration, the invention inverts the approach by replacing the gearbox and using an adaptor to connect it to the existing transfer case. This maintains the original transfer case position and driveline geometry while achieving the desired reconfiguration.

Inventive Principle:

Principle #13The other way round (Inversion)

4Reliability

If the transfer case is robustly constructed to withstand loads, then reliability is improved, but the difficulty of removal and replacement increases

Engineering Contradiction:

Improvetransfer case durabilityVSAvoidtransfer case replaceability

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The need to replace the robust transfer case is extracted from the replacement requirement. By introducing the adaptor transfer case as an intermediate component, the system allows the original transfer case to remain in place while achieving powertrain reconfiguration through gearbox replacement alone.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP4556281A1Transfer case

Publication Date: 2025.05.21 TITAN DESIGN & ENG PTY LTD

Figure 1
Figure 2
Figure 3

AI summary

An adaptor transfer case configured for use in a vehicle having a powertrain and a primary transfer case, where the adaptor transfer case comprises: an input shaft configured to be driven by the powertrain; and an output shaft configured for coupling to the primary input shaft of the primary transfer case; wherein the input shaft is configured to be coupled to the powertrain at a first side of the adaptor transfer case, and the output shaft is configured to be coupled to the primary input shaft of the primary transfer case at the first side of the adaptor transfer case. Also provided is a method of converting or reconfiguring the powertrain of a vehicle using the adaptor transfer case.